Materials Data on Nb3FeSe10 by Materials Project
FeNb3Se10 crystallizes in the monoclinic Pm space group. The structure is two-dimensional and consists of one FeNb3Se10 sheet oriented in the (1, 0, 0) direction. there are three inequivalent Nb4+ sites. In the first Nb4+ site, Nb4+ is bonded in a 8-coordinate geometry to eight Se+1.40- atoms. There are a spread of Nb–Se bond distances ranging from 2.66–2.85 Å. In the second Nb4+ site, Nb4+ is bonded in a 8-coordinate geometry to eight Se+1.40- atoms. There are a spread of Nb–Se bond distances ranging from 2.65–2.77 Å. In the third Nb4+ site, Nb4+ is bonded to six Se+1.40- atoms to form distorted NbSe6 octahedra that share edges with two equivalent NbSe6 octahedra and edges with two equivalent FeSe6 octahedra. There are a spread of Nb–Se bond distances ranging from 2.43–2.82 Å. Fe2+ is bonded to six Se+1.40- atoms to form FeSe6 octahedra that share edges with two equivalent NbSe6 octahedra and edges with two equivalent FeSe6 octahedra. There are a spread of Fe–Se bond distances ranging from 2.41–2.48 Å. There are ten inequivalent Se+1.40- sites. In the first Se+1.40- site, Se+1.40- is bonded in a 2-coordinate geometry to two equivalent Nb4+ atoms. In the second Se+1.40- site, Se+1.40- is bonded in a 2-coordinate geometry to two equivalent Nb4+ atoms. In the third Se+1.40- site, Se+1.40- is bonded to four Nb4+ atoms to form distorted corner-sharing SeNb4 tetrahedra. In the fourth Se+1.40- site, Se+1.40- is bonded in a 4-coordinate geometry to three Nb4+ and one Fe2+ atom. In the fifth Se+1.40- site, Se+1.40- is bonded in a 2-coordinate geometry to two equivalent Nb4+ atoms. In the sixth Se+1.40- site, Se+1.40- is bonded in a 2-coordinate geometry to two equivalent Nb4+ atoms. In the seventh Se+1.40- site, Se+1.40- is bonded in a 3-coordinate geometry to three Nb4+ atoms. In the eighth Se+1.40- site, Se+1.40- is bonded in a distorted trigonal non-coplanar geometry to one Nb4+ and two equivalent Fe2+ atoms. In the ninth Se+1.40- site, Se+1.40- is bonded in a 3-coordinate geometry to two equivalent Nb4+ and one Fe2+ atom. In the tenth Se+1.40- site, Se+1.40- is bonded in a 3-coordinate geometry to one Nb4+ and two equivalent Fe2+ atoms.